Video Transcript
Fill in the blank. The periodic table is the
collection and arrangement of blank. (A) Compounds, (B) molecules, (C)
chemical elements, (D) ions, (E) energy.
The periodic table consists of 118
cells arranged into 18 vertical columns and seven horizontal rows. Each of the cells represents one of
the 118 known elements. The cell provides information about
the chemical element, such as its atomic number, chemical symbol, element name, and
atomic mass. The chemical elements are arranged
into columns called groups and rows called periods.
We now know that the periodic table
is the collection and arrangement of chemical elements. So we should fill in the blank with
answer choice (C), chemical elements.
